Water Quality: Mount Vernon, WA
57 water systems • 148,891 people served
Multiple Health ViolationsWater Quality Summary
Mount Vernon is served by 57 public water systems with a combined service population of 148,891 people, and has 470 EPA Safe Drinking Water Act violations on record. Critically, 114 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Mount Vernon's violation count is 190% above the national average for Washington. Contaminants associated with violations include Barium, E. coli, TTHM, Total Haloacetic Acids (HAA5).
Contaminants Found
Increases blood pressure and causes cardiovascular effects with long-term exposure.
Common source: Natural rock deposits, oil drilling operations, coal power plant waste
EPA limit: 2 mg/L
Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.
Common source: Fecal contamination from humans or animals entering the water supply
EPA limit: Zero (no E. coli permitted in drinking water)
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Haloacetic acids are associated with increased cancer risk and potential reproductive and developmental effects.
Common source: Reaction of chlorine disinfectants with organic matter in treated water
EPA limit: 0.060 mg/L (60 ppb)
Water Systems Serving Mount Vernon
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| SKAGIT COUNTY PUD 1 JUDY RES | WA5379500 | Surface Water | 111,415 | 4 |
| ANACORTES CITY OF | WA5302200 | Surface Water | 21,105 | 0 |
| CARNATION WATER SYSTEM CITY OF | WA5311200 | Groundwater | 2,400 | 1 |
| SKAGIT CO WATER DISTRICT #1 | WA5300392 | Groundwater | 1,974 | 1 |
| WARM BEACH CONFERENCE GROUNDS | WA5392950 | Groundwater | 1,190 | 4 |
| CAMANO CO-OP WATER & POWER CO | WA5310600 | Groundwater | 1,071 | 4 |
| CAPE HORN MAINTENANCE COMPANY | WA5311060 | Groundwater | 940 | 0 |
| CONCRETE UTILITIES | WA5303950 | Groundwater | 810 | 6 |
| HILLCREST VILLAGE WATER CO INC | WA5333150 | Groundwater | 770 | 79 |
| LYMAN WATER DEPARTMENT | WA5349050 | Groundwater | 705 | 1 |
| SKAGIT CO PUD - ALGER | WA5301400 | Groundwater | 432 | 2 |
| SKAGIT CO PUD - CEDARGROVE | WA5311917 | Groundwater | 402 | 5 |
| TATOOSH WATER COMPANY | WA5387189 | Groundwater | 387 | 2 |
| KACKMAN CREEK | WA5307619 | Groundwater | 330 | 7 |
| MCKEES BEACH ASSOC | WA5324190 | Groundwater | 290 | 8 |
| NEWHALEM WATER SYSTEM | WA5359250 | Groundwater | 277 | 8 |
| GREEN ISLAND HILLS WATER ASSN | WA5300429 | Groundwater | 265 | 2 |
| CAMANO CITY COMMUNITY CLUB INC | WA5310590 | Groundwater | 246 | 8 |
| UTSALADY HEIGHTS OWNERS ASSN | WA5300982 | Groundwater | 240 | 3 |
| SKAGIT CO PUD - MARBLEMOUNT | WA53AA642 | Groundwater | 238 | 7 |
| Holiday Hideaway Water Co | WA5308236 | Groundwater | 235 | 9 |
| SKAGIT VIEW VILLAGE WATER SYSTEM | WA5396879 | Groundwater | 227 | 1 |
| DRIFTWOOD SHORES WATER SYSTEM INC | WA5320000 | Groundwater | 222 | 58 |
| BUENA VISTA COMMUNITY CLUB | WA5309150 | Groundwater | 200 | 6 |
| FINISTERRE HEIGHTS WATER SYSTEM | WA5302145 | Groundwater | 193 | 2 |
| SKAGIT CO PUD ROCKPORT | WA5373600 | Groundwater | 175 | 4 |
| ARROWHEAD BEACH COOP WATER ASSOC | WA5303000 | Groundwater | 167 | 43 |
| SILVANA WATER ASSOCIATION | WA5379050 | Groundwater | 153 | 1 |
| SNEE-OOSH LAND CO | WA5380800 | Groundwater | 123 | 0 |
| CAMANO SUNRISE WATER ASSN #2 | WA5329669 | Groundwater | 122 | 4 |
| O-ZI-YA Community Club | WA5362640 | Groundwater | 120 | 2 |
| VALLEY VIEW ESTATES WATER ASSN | WA5390993 | Groundwater | 113 | 0 |
| WHITESIDE HOMEOWNERS ASSOCIATION | WA5307581 | Groundwater | 90 | 1 |
| WIDARAMA BEACH WATER RIGHTS ASSN. | WA5396750 | Groundwater | 85 | 12 |
| CAMANO SUNRISE WATER ASSN #1 | WA5310746 | Groundwater | 76 | 0 |
| NORTH FIR ISLAND WATER ASSOCIATION | WA53AA747 | Surface Water | 76 | 5 |
| SKAGIT CO PUD - POTLATCH BEACH | WA5369034 | Surface Water | 75 | 1 |
| POINT ALLEN WATER ASSOCIATION | WA5368060 | Groundwater | 65 | 2 |
| SUNSET WEST WATER ASSOCIATION | WA5386205 | Groundwater | 62 | 6 |
| FIELDS WATER ASSOCIATION | WA5352590 | Groundwater | 60 | 3 |
| BAYSHORE WATER SYSTEM | WA5304930 | Groundwater | 56 | 4 |
| BEVERLY BEACH IMPROVEMENT CLUB | WA5306147 | Groundwater | 56 | 30 |
| UTSALADY POINT | WA5390850 | Groundwater | 54 | 2 |
| CAMANO COLONY WATER SYSTEM INC | WA5310595 | Groundwater | 53 | 1 |
| DIABLO WTR SYS-SEATTLE CITY LIGHT | WA5319200 | Groundwater | 53 | 12 |
| Whispering Firs at Firetrail | WA53AD238 | Groundwater | 51 | 0 |
| El Camano Community Club | WA5322593 | Groundwater | 49 | 1 |
| DOUBLE VIEW COMMUNITY CLUB | WA5319900 | Groundwater | 47 | 0 |
| CAMANO SUNSET WATER SYSTEM | WA5326951 | Groundwater | 47 | 27 |
| TOWNSHIP 29 WATER ASSOCIATION | WA5300484 | Groundwater | 42 | 38 |
| CAMANO ISLAND SUMMIT ASSOC. | WA5308344 | Groundwater | 42 | 2 |
| VIEWCREST WATER SYSTEM | WA5391902 | Groundwater | 39 | 8 |
| EAST CRYSTAL LAKE ESTATES COMMUNITY | WA5330164 | Groundwater | 38 | 4 |
| SEAWEST WATER SYSTEM | WA5337544 | Groundwater | 38 | 22 |
| SARATOGA SHORES COMMUNITY CLUB | WA5376250 | Groundwater | 35 | 2 |
| BAKERVIEW TERRACE COMM CLUB | WA5304025 | Groundwater | 34 | 4 |
| CREEKSIDE CAMPING | WA5328977 | Groundwater | 31 | 1 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Washington
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.